What particles are contained in the nucleus of an atom?
O electrons & protons
O neutrons & electrons
O neutrons & protons
O pixels & electrons

Answer:d

Explanation:

Answer:

The correct answer is D. velocity

Explanation:

I had that same question

Answer:

a

Explanation:

Peptides are hydrophilic, elicit immediate responses, require secondary messenger systems and binds to membrane bound receptors whereas steroids are hydrophobic, requires a transport proteins, binds to the receptors which are present on the nucleus of the cell.

Steroids are hydrophobic in nature and due to this hydrophobic nature, they are able to pass through the plasma membrane directly. They bind to the receptors which are present in the nucleus and not on the plasma membrane. They do not elicit response immediately but take several hours to even days.

Peptides being hydrophilic cannot cross the plasma membrane directly. They bind to the receptors which are present on the plasma membrane. They use the DAG, cAMP or IP3 systems.

To know more about peptides here

https://brainly.com/question/30332053

#SPJ4

The percentage yield is equal to 200.6%.

The balanced equation for the given chemical reaction is :

2C2H + 5O2 → 4CO2 + 2H2O

Let's find the limiting reagent:

Mass of C2H = 120 g

Mass of O2 = 288 g

Molar mass of C2H = 26 g/mol

Molar mass of O2 = 32 g/mol

The number of moles of C2H is equal to:

120 g × 1 mol/26 g = 4.62 mol

The number of moles of O2 is equal to:

288 g × 1 mol/32 g = 9 mol

According to the stoichiometry of the balanced equation, 2 moles of C2H react with 5 moles of O2, so:

If 4.62 moles of C2H is used, then the required amount of O2 would be:

5/2 × 4.62 mol = 11.6 mol

We only have 9 mol of O2 which means it is the limiting reagent.

C2H is the excess reagent.

Let's find the mass of water produced:

According to the stoichiometry of the balanced equation,2 moles of H2O is produced per 2 moles of C2H2 moles of H2O is produced per 5 moles of O2If 9 mol of O2 is used, the number of moles of water produced would be:

2/5 × 9 mol = 3.6 mol

The mass of water produced is equal to:

3.6 mol × 18 g/mol = 64.8 g

Therefore, 64.8 g of water can be produced.

The amount of excess reagent is equal to:

4.62 mol - 2/2 × 9 mol = 4.62 - 9

= -4.38 mol

C2H is the excess reagent and it is not possible to have negative amount of a substance.

So, we assume that there is no excess reagent.

If 130 grams of water is produced, then the percentage yield is equal to:

Percent yield = actual yield/theoretical yield × 100

Theoretical yield is equal to 64.8 g

Actual yield is equal to 130 g

Percent yield = 130/64.8 × 100

= 200.6%

Therefore, the percentage yield is equal to 200.6%.

For such more questions on percentage yield

https://brainly.com/question/11963853

#SPJ8

The titrimetric technique will have no effect on the reported percent acetic acid in vinegar despite periodically rinsing the wall of the flask with previously boiled, deionized water from the wash bottle.

Acetic acid is a common component in vinegar, which can be measured by titration. It is a quantitative chemical analysis method in which a solution of unknown concentration reacts with a standard solution of known concentration, typically until completion. It will cause the volume of the solution to be a slightly larger, and the concentration will be lowered when distilled or deionized water is added to the solution.

However, as long as the vinegar is measured against a known, unchanging standard, such as NaOH, the percent acetic acid reported in the vinegar would not change.

Rinsing the flask's walls with deionized water helps to ensure that the acetic acid reacts with the NaOH in the titration, and it reduces the risk of losing the NaOH and changing the final result. The volume of the vinegar sample used in the titration would be precisely measured, ensuring that the accurate amount of NaOH solution was used.

Learn more about Deionized water here,

https://brainly.com/question/6025332

#SPJ11

The amount of potassium hydroxide required 1683 g.

To prepare 5.00 liters of a 6.00M solution of potassium hydroxide, you will need to calculate the amount of potassium hydroxide required. To do this, use the formula:

\(mass (g) = volume (L) *\ molar mass * molarity (M)\)

Therefore, the mass of potassium hydroxide needed is:

mass (g) = 6.00 M * 5.00 L * 56.1 g/mol

mass (g) = 1683 g

Once you have calculated the amount of potassium hydroxide needed, you must weigh out the correct amount using a laboratory balance.

Next, you will need to transfer the potassium hydroxide to a glass container that can hold the 5.00 liters of solution.

Finally, you will add deionized water to the container until the total volume of the solution is 5.00 liters.  Stir the solution until the potassium hydroxide is completely dissolved.

Your 6.00M solution of potassium hydroxide is now ready to use.

learn more about potassium hydroxide Refer:brainly.com/question/21904397

#SPJ1

It takes approximately 6 half-lives for there to be less than 1% of Uranium-238 left and approximately 5 half-lives for there to be less than 1% of Uranium-235 left.

The concept of half-life is a fundamental aspect of radioactive decay. The half-life of a radioactive substance is the time it takes for half of the initial amount of the substance to decay. After one half-life, 50% of the substance remains, after two half-lives, 25% remains, and so on.

For Uranium-238, which has a very long half-life of about 4.5 billion years, it takes approximately 6 half-lives to reach less than 1% of the initial amount. This means that after each half-life, the amount of Uranium-238 is halved, and after six such halvings, less than 1% is left.

On the other hand, Uranium-235 has a shorter half-life of about 703.8 million years. Thus, it takes approximately 5 half-lives for Uranium-235 to reach less than 1% of the initial amount.

Knowing the number of half-lives required for a substance to reach less than 1% of its initial quantity is important in various scientific and practical applications, particularly in understanding radioactive decay and the behavior of radioactive materials over time.

Learn more about half-lives here:

https://brainly.com/question/30599798

#SPJ11

Answer:

Its the second one.

Explanation:

Answer:

This combination product contains 2 medications, acetaminophen and an antihistamine. Acetaminophen helps to reduce fever and/or mild to moderate pain (such as headache, backache, aches/pains due to muscle strain, cold, or flu).

Explanation:

it will help you. may be

Answer:

looooser

mark me brailist

Answer:

15M

Explanation:

To find molarity, you use the equation :

Molarity = \(\frac{moles of solute}{liters of a solution}\)

So to find the molarity, you would do 90mols of the solute divided by 6 liters of the solvent which is 15M.

Answer:

scientific community's consensus on the human causes of global climate change

Explanation:

These characteristics serve as guidelines for assessing the health and quality of aquatic environments, supporting the well-being of fish and other aquatic organisms.

Water temperatures below 86°F (30°C) for warm-water fisheries and below 68°F (20°C) for cold-water fisheries: Different fish species have different temperature preferences for optimal growth and survival. Warm-water fisheries generally thrive in higher water temperatures, while cold-water fisheries prefer cooler temperatures. Water temperatures outside these ranges can stress fish and disrupt their natural habitat.

Dissolved oxygen levels above 5 mg/L: Oxygen is essential for aquatic organisms, including fish, to breathe and carry out their metabolic processes. Adequate dissolved oxygen levels are necessary to support healthy aquatic ecosystems. Oxygen can enter the water through aeration from the atmosphere, photosynthesis by aquatic plants, and mixing with flowing water.

pH between 6 and 9: pH is a measure of the acidity or alkalinity of water. Most aquatic organisms, including fish, have adapted to function within a specific pH range. A pH between 6 and 9 is generally considered suitable for supporting diverse aquatic life. Extreme pH levels outside this range can be detrimental to aquatic organisms.

Streams should be "free from" sediments: Excessive sedimentation in streams can negatively impact aquatic ecosystems. Sediments can smother fish eggs, suffocate benthic organisms, and reduce water clarity, which affects photosynthesis and the availability of food sources. Healthy streams have a natural balance where sediment inputs are minimal, allowing for clear water conditions.

These characteristics serve as guidelines for assessing the health and quality of aquatic environments, supporting the well-being of fish and other aquatic organisms. However, it's important to note that specific water quality requirements may vary for different species and ecosystems.

Learn more about aquatic environments from below link

https://brainly.com/question/1023703

#SPJ11

The stoichiometric balanced equation helps to find out the mass of carbon dioxide released. The mass of the carbon dioxide produced when 0.76 grams of methane is burned is 2.09 g.

The relative amounts of the products and reactants in a balanced equation is defined as the stoichiometry of a reaction. This concept is generally used to balance the chemical equations.

The combination of hydrogen and oxygen to form water is represented by the stoichiometric equation:

2H₂ + O₂ → 2H₂O

Here in the given CH₄ + 2 O₂ --> CO₂ + 2 H₂O, 16 g of methane reacts with 64 g of oxygen and produces 44 g of carbon dioxide and 36 g of water.

So 0.76 g of CH₄ produces 44 g × 0.76 g / 16 g = 2.09 g CO₂ .

Thus the mass of CO₂ produced is 2.09 g.

To know more about stoichiometry, visit;

https://brainly.com/question/29775083

#SPJ1      

1. a. 3

b. 2

2. a. 4

b. 6

3. a. 1

b. 2

4. a. 5

Which solution is the least concentrated?

O 2

The following statements on HPLC modes are true is more polar compounds elute first in normal-phase HPLC (Option E).

The liquid chromatography (HPLC) is a technique in analytical chemistry employed for the separation, identification, and quantification of elements. It is considered a highly sensitive method, and it works by separating the components in a mixture with the assistance of a solvent under high pressure.

There are two modes of HPLC: Reversed-Phase HPLC (RP-HPLC) and Normal-Phase HPLC (NP-HPLC). In RP-HPLC, a nonpolar stationary phase, such as C18, is used, and polar solvents, such as water, are used as mobile phases. Polar stationary phases, such as silica gel, are used in NP-HPLC, while nonpolar solvents, such as hexane, are used as mobile phases.

More polar compounds have a greater affinity for the polar stationary phase than less polar compounds, which have a higher affinity for the nonpolar mobile phase in NP-HPLC. As a result, less polar compounds elute first in normal-phase HPLC.

Thus, the correct option is E.

Learn more about HPLC: https://brainly.com/question/13490391

#SPJ11

Aristotle focuses only on propositions, assertions, or statements that are (or could be) true or untrue (apophanseis).

Like the majority of logicians after him, he concentrates on a small number of quantifiers. He asserts that each premise is either general, specific, or ambiguous. Therefore, a proposition (protasis) is a statement that affirms or denies something of something, and it might be general, specific, or indefinite. When I say something is universal, I mean that it belongs to everything or to nothing; when I say something is particular, I mean that it belongs to some people or not to some people or to all; and when I say something is indefinite, I mean that it does or does not belong without any indication that it is universal or particular, for example, "contraries are subjects of the same science" or "pleasure is not good."

Learn more about concentrates here-

https://brainly.com/question/10720472

#SPJ4

Answer:

a

Explanation:

everything can be broken down to a smaller less useful compounds but never destroyed

Answer:

158.4 g

Explanation:

Find mass of CO2

= Number of moles x molar mass

= 3.6 mol x (12 + 16 + 16)

= 3.6 mol x 44

= 158.4 g

Direct expansion systems require the vapour exiting the evaporator to be superheated to avoid liquid slugging, to improve the effectiveness of the evaporator and to maintain the stability of the compressor. (B) Forced draft and induced draft evaporators differ in the way air is introduced into them. (C) CClF2CF3 (also known as R12) is a chlorofluorocarbon refrigerant. (ii) Tetrafluoroethane (also known as R134a) is a hydrofluorocarbon refrigerant and H2O is not classified as a refrigerant. (D) The partial pressure of hydrogen in the evaporator is 1.6 mmHg.

(a) Direct expansion systems are those in which the refrigerant in the evaporator evaporates directly into the space to be cooled or frozen. The evaporator superheat is used to make sure that only vapor and no liquid is carried over into the suction line and compressor. Superheating is required for the following reasons :

(b) Forced draft and induced draft evaporators differ in the way air is introduced into them. In an induced draft evaporator, a fan or blower is positioned at the top of the evaporator, and air is drawn through the evaporator from the top. In a forced draft evaporator, air is propelled through the evaporator by a fan or blower that is located at the bottom of the evaporator. Forced draft evaporators are frequently used in direct expansion systems because they allow for better control of the air temperature. Because the air is directed upward through the evaporator and out of the top, an induced draft evaporator is less effective at keeping the air at a uniform temperature throughout the evaporator.

(c) (i) CClF2CF3 (also known as R12) is a chlorofluorocarbon refrigerant.

(ii) Tetrafluoroethane (also known as R134a) is a hydrofluorocarbon refrigerant.

(iii) H2O is not classified as a refrigerant.

(d) The function of hydrogen gas in an absorption refrigeration system (NH3/H2O/H2) is to increase the heat of reaction between ammonia and water.

The pressure of hydrogen gas in the evaporator of an absorption refrigeration system can be determined using the formula, Pa/Pb = (Ta/Tb)^(deltaS/R),

where Pa = partial pressure of hydrogen in the evaporator, Ta = evaporating temperature, Tb = condensing temperature, Pb = partial pressure of hydrogen in the absorber, deltaS = entropy change between the absorber and evaporator, R = gas constant.

Substituting the given values, Ta = −2.0 ∘C = 271 K ; Tb = 38.0 ∘C = 311 K ; Pb = atmospheric pressure = 1 atm ;

deltaS = 4.7 kJ/kg K ; R = 8.314 kJ/mol K

we get, Pa/1 atm = (271/311)^(4.7/8.314)

Pa = 0.021 atm or 1.6 mmHg

Therefore, the partial pressure of hydrogen in the evaporator is 1.6 mmHg.

Thus, Direct expansion systems require the vapour exiting the evaporator to be superheated to avoid liquid slugging, o improve the effectiveness of the evaporator and to maintain the stability of the compressor. (B) Forced draft and induced draft evaporators differ in the way air is introduced into them. (C) CClF2CF3 (also known as R12) is a chlorofluorocarbon refrigerant. (ii) Tetrafluoroethane (also known as R134a) is a hydrofluorocarbon refrigerant and H2O is not classified as a refrigerant. (D) The partial pressure of hydrogen in the evaporator is 1.6 mmHg.

To learn more about chlorofluorocarbons :

https://brainly.com/question/18414838

#SPJ11

Answer:

\(5.1 \div 5.63\)

c) Current cannot flow

Reason: Because the switch is not closed.

Answer:

current can't flow

Explanation:

by the way of explanation it is open circuit in which the current flow whereas in closed circuit the current flow.

if you like my answer please mark as brainlist.

it will be too much help for me.

Answer:

In the backrest use materials where it is easy to clean and where they do not absorb fluids, in this way it would be cooler, such as an ecological leather simulator.

And in the armrest as well, but in both areas we must not rule out that if or if it should have even a minimum of padded surface so that the patient or the person who spends most of the day in the wheelchair does not suffer from joint pain.

Explanation:

Some wheelchair factories also implement modern chairs where they are made of stainless steel structures lined with padded material with perforated fabrics that allow breathing and aeration of body areas that have contact with the fabric.

The solutions to problems caused by nitrogen gas in solution at certain depths is by discouraging deep diving.

This involves moving around under water with the aid of special breathing equipment.

Limiting the depth of a dive should he encouraged as the maximum depth limit for a diver to use compressed air is 30 to 50 meters.

Read more about Diving here https://brainly.com/question/21503692

In ionic bonds, alkaline earth metals will lose two electrons to achieve a stable octet configuration.

Alkaline earth metals belong to Group 2 of the periodic table and have two valence electrons. They tend to lose these two electrons to achieve a stable electron configuration, forming ions with a +2 charge.

This is because alkaline earth metals have two valence electrons in their outermost shell, and losing these electrons will result in a full shell and a more stable configuration.

#SPJ11

It seems that Ryan's estimate of 4 hours is not reasonable. It should take him closer to 8 hours to mow a lawn that is twice as large as the one he can mow in 2 hours.

To determine whether Ryan's estimate is reasonable or not, we can calculate the area of each lawn and compare the results.

The area of the 50 feet by 110 feet lawn is:

Area = length x width = 50 ft x 110 ft = 5500 sq ft

Since Ryan can mow this lawn in 2 hours, his mowing rate is:

Rate = Area / Time = 5500 sq ft / 2 hrs = 2750 sq ft/hr

Now, let's calculate the area of the 100 feet by 220 feet lawn:

Area = length x width = 100 ft x 220 ft = 22000 sq ft

If Ryan's mowing rate is consistent, then the time it will take him to mow this lawn is:

Time = Area / Rate = 22000 sq ft / 2750 sq ft/hr = 8 hours

For more question on hours click on

https://brainly.com/question/24054994

#SPJ11

Answer:

6 Li + N2 - 2 Li3N........